EP0945538A1 - Method and device for treating textile fabrics in roped form - Google Patents

Abstract

The fabric (4) is loaded into the vessel (1) using air or a steam/air mixture at 80 degrees C to drive the circulating jet (12). The vessel is closed and steam at e.g. 120 degrees C is introduced as an initial treatment. The fabric is allowed to cool before the normal wet treatment is commenced. An Independent claim is also included for a pressure vessel (1) fitted with a jet (12) for circulating a fabric which has an additional connection (21) for introducing steam. A steam injection connection (21a) can also be provided for the gas circuit used to circulate the fabric.

Description

The invention relates to a method and a device for the treatment of strand-like textile goods.

Be on the quality of a finished textile very high demands are being made today. The result of a coloring should e.g. regarding the color, authenticity and authenticity as well as the required The quality of the surface of the goods is perfect and be reproducible. These requirements will be further complicated by the fact that in the manufacture of the textile fabrics new goods constructions, substrates and yarn structures that are used in Use of conventional piece finishing processes and -machines are not readily satisfactory results deliver. In the finished goods, e.g. i.a. unwanted creasing or wrinkling along with Color irregularities, etc. Add to that these appearances occasionally only when washing or steaming of made-up goods made from finished textile goods Articles appear or become visible.

Dyeing machines are often used today for piece finishing used on the so-called aerodynamic Principle. Aerodynamic piece dyeing machines are described, for example, in Melliland Textile Reports 69 (1988, pages 748 to 754), in textile technology 38 (1988, Pages 31 to 35) and in International Textile Bulletin Refinement 31 (1985, 3, pages 27 to 41), where an aerodynamic System for refining piece goods in detail is explained. The aerodynamic treatment system is essentially based on the fact that an endless line of goods in a closed container using a transport nozzle system often in the form of a jet nozzle, in circulation which is charged with a gas stream, which the goods train its feed movement in the predetermined Direction of circulation granted. It is from EP 0 014 919 is known for the transport of the warmed gas to use that due to its temperature affinity between the treatment agent and the textile material and maintains. With one in this publication explained embodiment is allowed to dry knitwear made of stranded textured polyester fiber material run into the container, the transport by a Steam flow from the transport nozzle system and mechanical Support is provided by a driven roller. After The textile goods are turned on to complete the loading process its ends sewn together to form an endless strand of goods and in the sealed container using a Steam flow circulated and to the dyeing temperature heated up. The dye liquor preheated outside the container is then pressed in via the jet nozzle, whereby the steam introduction is throttled accordingly, so that ultimately the goods are transported through the treatment fleet he follows. With the introduction of the preheated Dyeing liquor starts the dispersion dyeing immediately the polyester fiber material at the wet fix temperature of the disperse dye. Feeding the knitwear using steam at 1.5 bar gauge pressure (approx 128 ° C) is problematic for safety reasons. Furthermore lies the task of the process section working with steam only in the heating of the textile product line on the dyeing temperature.

EP 0 078 022 B2 describes a method for treatment of textile goods in jet dyeing plants, which is also known works on the aerodynamic principle and at the dyes, chemicals and auxiliaries in the treatment fleet solved and the transport nozzle (jet nozzle) pressurized, circulated gas flow in the area of Nozzle section for the goods drive can be added. Here the fleet is distributed finely and evenly on the Surface of the textile goods forming the goods strand distributed. The penetration of the fibers and thus the Fleet exchanges in the textile goods are optimal. At the same time allows this aerodynamic system with one extremely short liquor ratio even when the Container to work and thus the total water consumption, as well as the use of chemicals, auxiliaries, dyes, etc. to reduce. In addition, the aerodynamic drive of the circulating line of goods very much high product speeds. Except in practice known machines of different types are after textile treatment machines working in an aerodynamic system, e.g. also in EP 0 665 319 A3 and 0 640 710 A2 described. In the known from EP 0 640 710 A2 Process for treating a textile web is out the web has an endless web loop, which during its by one of a gaseous fluid flowed through nozzle within the treatment facility a mechanical and / or thermal transport Is subjected to treatment to reduce the volume, the handle, the surface appearance or the water content of the To change the web loop specifically. It is about a final and finishing treatment to the as Fluid can also be used with steam, if necessary a gaseous or mist-like treatment agent is added is evenly applied to the web becomes.

The object of the invention is a method and Device for treating strand-like textile goods create that allow even those who are difficult to treat Textile goods in piece dyeing machines have high requirements to the surface quality and in particular the stability of a refined piece goods in terms of Dimensional stability, the avoidance of creases and wrinkles, Bolder, etc. are enough.

According to the invention, to achieve this object proceeded the method of claim 1. One to carry out This device is suitable according to this method further invention subject of claim 17.

The invention is based on the consideration that the Causes of color irregularities, wrinkles and the like often lie in the raw material. Already in the Yarns, as well as in the textiles made from them Sheets are fabricated Tensions contain, which thereby frictionally blocked are that the yarns are in the fabric or knitted fabric cross over or devour each other. During treatment in the course of finishing, for example the coloring due to the mechanical impact on the textile goods Temperature increase, the swelling behavior of the fibers, etc. the States of tension in the textile goods partially removed, with the result that after finishing the finishing in undesired local phenomena of the finished goods, e.g. Wrinkles or creases become visible. This is moving hence that the voltage states during different Phases of the treatment process in uncontrolled Be solved in a way and thereby a corresponding Uneven treatment effect on the textile goods results. Basically, the same applies to signs of shrinkage, the during the course of treatment occur.

The new procedure will be timed before treatment with the treatment agent, e.g. B. the dye liquor, in at least one separate preparation or pre-treatment step through direct exposure to water vapor (Steaming) on the textile material present in the textile material Tensions are released and / or there is a shrinkage of the Textile goods causes. For this, the preparation and / or Pretreatment step the transport nozzle means only applied with steam, the line of goods during a predetermined exposure time of the steam this is driven, circulated. During this Time the textile material is at a predetermined pretreatment temperature brought and / or kept on this, this pretreatment temperature regardless of the Start temperature at the subsequent treatment stage with a treatment agent, for example a dye liquor.

By steam treatment of the textile goods in one preceding the actual finishing treatment, separate pretreatment or preparation step a largely complete relaxation and shrinking of the Textile goods achieved, being that of the goods manufacturing resulting latent tensions balanced and resolved become. The textile is therefore already at the beginning of the Finishing treatment in a uniformly tension-free Initial state, so that in the subsequent treatment no uneven wrinkles, shrinking and the like occur more. Through the steam treatment of polyester and knitwear results the advantage that textured used in this knitwear Yarns in the prep or pretreatment step experience a bulge development, so the handle the goods become more voluminous. The steam treatment comes with an intended treatment temperature of, for example, approx. 130 ° equal to a heat setting, in which the in the hose existing polyester knitwear shrinks and therefore one Stabilization against annoying wrinkles in the subsequent coloring.

The new process is based on an aerodynamic Piece dyeing machine carried out in the the strand of goods can circulate without loading the fleet. The textile good can at the beginning of the preparation and / or pre-treatment step be dry or damp or wet.

Since the textile goods during the preparation or Pre-treatment step only the action of the Line of goods exposed to circulating water vapor is, it can happen when passing through the transport nozzle means and a downstream scanner to open. This leads among other things that the line of goods better relocated, so the danger of permanent Wrinkle embossing in the textile goods reduced or completely is prevented. Because of the better opening can the textile goods are also better distributed in the store, so that the deformation in the wrinkle area is significantly less is. This gives the textile goods the opportunity to to relax the goods run continuously, i.e. to relax so that, as explained above, the following Treatment steps for finishing the textile goods of a perfectly even, relaxed product going out, and no permanent in the dyeing process Deformations can occur more. With steam treatment and raising the textile material to the pretreatment temperature condensation of water vapor occurs on the textile fibers. The resulting resulting limited moisture absorption already causes a accordingly limited swelling of the textile fiber material, which in turn stabilizes the goods structure is achieved.

Because the pretreatment temperature of the textile goods regardless of the treatment temperature at a subsequent one Treatment step, it may be appropriate if the textile goods at the end of the preparation or pre-treatment step from the pretreatment temperature a predetermined temperature is cooled. This can e.g. happen in such a way that the transport nozzle means a temperature-controlled gas flow be charged. An inert gas stream can also be used be used.

The temperature of the textile material during the preparation or pretreatment step and / or at one another step during his treatment, can also go through Contact of the transport nozzle means flowing through the container pressurizing gas, steam or steam / air flow with one maintained outside in the container the surface of the liquid present be managed. For example, Treatment fleet passed through a heat exchanger into the tank and there be adjusted to a level below of the goods line lies, so that this with the fleet does not come into contact. The temperature of this fleet is regulated via the heat exchanger so that a controlled Cooling of the flowing gas stream occurs. The gas or steam flow is cooled by the direct contact with the colder treatment fleet and due to the condensate content resulting from the water vapor content precipitates and at the same time heat the gas deprives. The heat exchange surface with the gas or Steam flow can be increased by the cooling Liquid down on the inside wall of the container will flow into a swamp.

The described to regulate the temperature of the Textile good liquid (water) collects in the lower part of the container from whose sump they are is suctioned off. If necessary, it can be used as a rinsing liquid (Rinse water) can continue to be used.

The container can at least in the preparation or Pre-treatment step after steam application begins the transport nozzle means temporarily to the atmosphere be opened, one in the container containing air volume, at least partially from the Container is removed and replaced with steam. The steam is used in the air space of the container reduce remaining oxygen. This Oxygen content could, for example, in a subsequent one Treatment step used reduced vat dyes, which are in leuco form. Besides by expelling or reducing the oxygen content, Chemicals and products that are otherwise used Binding of atmospheric oxygen is required, saved, which means that with the resulting lower need for reducing agents also a reduction the pollution of the wastewater is reached.

It has proven to be advantageous for certain textile goods proven if at the end of the preparation or pre-treatment step at which is at the treatment temperature adjusting water vapor pressure, for example by Opening a hot drain valve, a relative one rapid pressure reduction is carried out in the container. Because of the amount of condensate and their heat content becomes an amount of flash steam free, through which a partial opening of the strand-shaped Goods are made that counteract wrinkling. This evaporation process is carried out during a predetermined Keep up time.

The one set up to carry out the new procedure Device has a closable, pressure-resistant Containers, transport nozzle means for one in the form of a endless line of textile material and one on the pressure side with the transport nozzle means and on the suction side gas circulating device connected to the container on. By means of an addition device for liquid treatment agent can treat agents in the field of transport nozzle means on the textile material with a given Treatment temperature can be brought into effect. For the direct steam treatment of the textile goods during the preparation or pre-treatment step enable, the device is one with the transport nozzle means leading connection device for a Provide steam source, which acts on steam at least during the preparation or pretreatment step is.

Further training of the new procedure and the new one Device are the subject of dependent claims.

Figur 1

eine Hochtemperatur (HT)-Stückfärbemaschine gemäß der Erfindung, im Querschnitt, in einer Seitenansicht und in schematischer Darstellung,

Figur 2

Die Maschine nach Fig. 1 in einer Vorderansicht in einem anderen Maßstab, und in schematischer Vereinfachung,

Figur 3 und 4

die Stückfärbemaschine nach Anspruch 1 in jeweils abgewandelter Ausführungsform in einer entsprechenden Darstellung

An exemplary embodiment of the object of the invention is shown in the drawing, in which:

Figure 1

a high temperature (HT) piece dyeing machine according to the invention, in cross section, in a side view and in a schematic representation,

Figure 2

1 in a front view on a different scale, and in a schematic simplification,

Figures 3 and 4

the piece dyeing machine according to claim 1 in a modified embodiment in a corresponding representation

The high temperature shown in Figures 1 to 4 (HT) piece dyeing machine is a device for Implementation of the method according to the invention. She points one illustrated only schematically in FIG. 1 closed container 1, which as essentially cylindrical pressure vessel is formed. In the container 1 lead, as can be seen from Fig. 2, two operating opening 2, each one a memory 3 for an endless Goods strand 4 assigned and by an operator lock 5 can be closed in a pressure-tight manner.

From the container 1 goes up for each of the two Storage 3 each from a vertical pipe socket 6, which in a cylindrical housing 7 opens into which one through a frequency-controlled electric motor driven reel 8 is rotatably mounted. From the housing 7 leads a tubular Transport route 9 obliquely down into the container 1 back to which in the container 1 a taper 10 connects. The scanner 10 allows the over Transport route 9 fed endless line of goods 4 in its associated memory 3, as at 11 in figure. 1 is indicated. Between the housing 7 and the Transport route 9 is a Venturi transport nozzle 12, which is surrounded by a nozzle housing 13. The transport nozzle 12, the nozzle housing 13 and the transport path 9 together form transport nozzle means to which the in a reciprocating pivoting movement in a manner known per se executing tapers 10 connects. To the Nozzle housing 13 is the pressure line 14 of a gas circulation system connected, the one on the pressure side with the Pressure line 14 and on the suction side with a suction line 16 connected blower 15 contains the compression means forms. The suction line 16 is coaxial to the container axis connected to the container 1 and leads into one coaxial guide cylinder 17 within the container 1. The Guide cylinder 17 is on the opposite side of the suction line 16 Side open to the inside of the container. It contains a gas filter 18 which is part of the fan 15 and the lines 14, 16 formed gas circulation device.

In the pressure line 14 there is a butterfly valve 19. In addition opens into the pressure line 14 through a valve 20 closable steam connection piece 21, which with a external steam source not shown in the figures is connected, which allows water vapor with an overpressure of approx. 1.7 bar (at approx. 130 ° C). Alternatively the steam connection piece can also be in the suction pipe 16 of the fan 15 open.

The blower 15 is frequency controlled Electric motor driven, which allows the speed and so that the performance of the blower 15 can be changed continuously.

In the container 1, the two stores 3 are in 2 at 22 indicated side walls, that do not reach the container wall, so that in the entire container 1 for all storage 3 a common Atmosphere is present.

In the area of each of the stores 3 goes from the deepest A drain line 23 at the point of the container 1 (Fig. 2) starting from a common treatment agent filter 24 leads that in a treatment medium circulation circuit which is a treatment agent circulation pump 25 contains. The treatment agent circulation pump (25) is on the suction side via a liquid supply and drain connections 26, 27 containing suction line 28 with the treatment agent filter 24 connected, the suction line 28 a Shut-off valve 29 contains. The is on your print page Treatment agent circulation pump 25 via a heat exchanger 30 and an injection line 31 with the nozzle housings 13 of the two memories 3 in connection. It therefore allows it via a control valve 32 assigned to each store 3 Treatment agent directly into each of the transport nozzles 12 to inject gas flow.

An additional container 33 is set up next to container 1, which via a pump 34 and a shut-off valve 35 containing line 36 with its lower part to the Suction line 28 is connected. From the additional container 33 goes through at the bottom on the suction side of the pump 34 a shut-off valve 37 shut-off drain line 38. In addition, a circulation line branches from line 36 39, which contains a shut-off valve 40. Finally the additional container 33 is still a shut-off valve 41 containing line 42 with the pressure side of the treatment agent circulation pump 25 connected. At 43 are each 44 shut-off supply lines for Finishing products (additives) or water in the Additional container 33 indicated. The shut-off valve 35 in the Line 36 is provided with a control valve 45 containing bypass 46 connected to line 36 is bridged. In the embodiment shown in Figures 1 to 3 finally branches off from the injection line 31 Treatment agent circulation pump 25 in the flow direction behind the heat exchanger 30 is a treatment medium circulation line 47 starting in the treatment agent filter 24 opens and contains a shut-off valve 48.

In addition, the container 1 is in the area of its upper part provided with a vent valve 49 (FIG. 2), that comes from a vent line 50 into the closed gas connection piece via a shut-off valve 51 52 leads, which allows, for example, inert gas (nitrogen) or introduce air into container 1.

In operation, in the container 1 in each of the stores 3 each treated a strand-like textile material, the after introduction by the respective company the closure 5 closed loading opening 2 an endless strand 4 was put together. Of the Line of goods 4 runs over the driven reel 8 in the Transport nozzle 12, which in operation via the pressure line 14 is acted upon by gas and the product line 4 one Feed in the specified direction of rotation (in Fig. 1 in Clockwise). The scanner 10 is the the line of goods 4 which runs out of the conveyor line 9 are cut off initiated in the respective memory 3, in which he is stored in the form of a package of goods that at 53 in Fig. 1 is indicated.

From the memory 3, which is on its underside a curved wall indicated at 54 (FIG. 1) delimits which is formed by plastic-coated stainless steel tubes is, the line of goods 4 is driven by the Haspel 8 excavated and, as already mentioned, in the Transport nozzle 12 initiated.

The wet treatment of the respective product strand 4 takes place in one or more treatment steps, at which are typically the transport nozzle 12 via the blower 15 with gas extracted from the container 1 in the form of a Steam / air mixture is applied through the container 1 and the fan 15 is not circulated. As a result, the merchandise strand 4 circulates clockwise offset, wherein, as mentioned, the memory 3 goes through. About the injection line 31 is in the associated Nozzle housing 13 in the from the pressure line 14th injected gas flow treatment agent injected that through the gas flow onto the one passing through the transport nozzle 12 Textile material applied finely and on this Action is brought. The treatment agent is through the treatment medium circulation pump 25 in which the suction line 28 and the injection line 31, as well as the two Transport nozzles 12 and the circuit containing the container 1 circulated. The shut-off valves 32 and 24 are open, while the shut-off valves 48, 41, 35 are closed are. In the lower part of the container 1 is from both strands 4 and the drains 3 dripping liquid treatment agents, the so-called treatment liquor. After the wet treatment is complete, the treatment fleet drained via the liquid drains 27.

That in the container 1 in the form of the two strands 4 contained textile goods are rinsed and then if necessary, tumbled before venting the container 1 and opened closures 5 from the container 1 is removed.

The circulation line 47 allows it when open Valve 48 and closed shut-off valves 32 in one from the container 1 separate circuit from the additional container 33 to circulate removed processing agent and via the heat exchanger 30 to one for the subsequent one Injection into the gas stream generated by the blower 15 appropriate temperature so that it e.g. isothermal Conditions with the textile is merged.

According to the invention, before the wet treatment described the textile goods present in the form of the goods 4 in a separate preparation or pre-treatment step subjected to steam treatment to thereby an at least almost complete relaxation and To achieve shrinkage of the textile goods before it through the subsequent wet treatment is refined. In doing so the latent tensions arising from the manufacture balanced and canceled in the textile goods.

The steam treatment is carried out on the textile direct inflowing water vapor from an adjustable Steam source via the steam connection piece 21 and the Pressure line 14 introduced into the respective nozzle housing 13 becomes. This becomes the respective transport nozzle 12 of a strand of goods 4 passing through this directly flowing steam to a pre-determined pretreatment temperature heated up regardless of the following Wet treatment, i.e. Finishing or dyeing temperature is and according to the substrate and article specific Values.

The described water vapor pretreatment for dissolving of internal tension and shrinking of the textile goods can be used for dry or damp textile goods, but also for For example, wet textile goods originating from a prewash be performed. It is based on some Exemplary embodiments explained:

example 1

1, 180 kg of a polyester circular knit fabric in the hose, not cut open, are run into a strand shape in parallel via the two opened feed openings 2. With a hose width of 90 cm and a fabric weight of 160 g / m ^{2, this} corresponds to a draw-in length of 600 m per store 3.

The goods are transported aerodynamically when they are drawn in by means of the fan 15 from the container 1 sucked in and compressed by the fan 15 air flow the transport nozzles 12 of the two reservoirs 3 acted upon. The goods are transported mechanically Supported by the powered reel 8. After the beginning of the goods is from the inlet of the tubular goods the loading opening 2 removed and with the end the tubular fabric is sewn together. The now endless line of goods 4 is initially in with the help of the gas cycle a relatively slow orbital movement, so no disruption to the flow of goods due to the goods being stowed occurs in the inlet part of the goods store 3. The Operating locks 5 of the two memories 3 are closed and it is now with the steam treatment began.

For this purpose, the steam connection piece 21 with the shut-off valve 20 open from a steam source Steam is introduced into the transport nozzles 12.

Through the machine program are for every memory 3 on the speed of the reel 8 the rotational speed of the product line 4 as well as that for the appropriate flow rate of the steam / air mixture required Power value of the blower 15, the working frequency of the scanner 10 to form the paneled Goods package 53, the pretreatment temperature and the Heating gradient to be regulated in ° C / min for the on the Pressure side (or alternatively the suction side) of the fan 15 incoming steam flow.

When the vent valve 49 is open, the first phase of the steam inflow the heating rate of the textile goods until the so-called Locking temperature kept low of approx. 80 ° C, thus increasing the water vapor saturation of the initially a sufficient existing steam-air mixture Air can flow out via the vent valve 49. As soon as the air volume in the container 1 largely displaced and replaced by steam, it becomes Vent valve 49 closed.

In the now closed container 1 increases due to the inflowing water vapor the vapor pressure and hence the steam temperature. According to this state of steam acts the steam in the transport nozzles 12, in the Transport routes 9, as well as on the surface of the respective store 3 stored strand 4 in direct contact with the textile, whereby due to a very large porosity of this textile substrate Contact surface results. The textile material is thereby the condensation of the steam up to that of the respective Vapor pressure predetermined saturation temperature heated. The process corresponds to a latent heat transfer, where the heat of condensation on the textile is transmitted. After reaching the programmed pretreatment temperature this pretreatment temperature becomes approx. 130 ° C through appropriate regulation of the steam supply constant during a predetermined hold time held, i.e. the throttled steam supply covers them Heat losses that occur due to the radiation.

With this steam treatment, the textile material of the two strands 4 loaded with condensate, the Condensate loading due to the weight of the textile, the specific Warmth of the textile goods and the total at Heating present temperature difference is determined. The proportion of condensate in the steam that is generated during heating the walls of the container 1, the contained therein Steel parts etc. accumulates in the lower one Container part below the storage wall 54 in one Swamp and does not come with the circulating product lines 4 in touch.

The product strands 4 are during the heating phase and the subsequent holding phase at approx. 130 ° C continuously kept in circulation.

After the hold time at 130 ° C is closed Steam valve 20 the corresponding hot drain valve the liquid drains 27 opened. By opening of the hot drain valve takes place proportionally rapid pressure reduction in container 1, which results in that because of the amount of condensate distributed in the textile and its heat content releases an amount of relaxation steam is through which a partial opening of the strand-shaped Textile goods are carried out, the undesirable wrinkling counteracts. This evaporation process is carried out over a Maintain pre-programmed time. After that it will Hot drain valve closed again.

In the additional container 33 there is now a treatment bath prepared with detergent additives. It the shut-off valves 32, 35 are opened, so that Treatment bath from the additional container 33 via the injection line 31 and the transport nozzles 12 on the textile with the textile material at the same temperature for exposure brought.

As soon as in the lower part of the container 1 Amount of treatment bath required for circulation accumulated has, the valve 35 is closed while the Shut-off valve 29 opened and thus the treatment bath injection system is switched to circulation. over the heat exchanger 30 becomes the circulating treatment agent the start temperature of the next wet treatment step, with dispersion coloring on e.g. 50 ° C. cooled. As soon as the textile reaches this temperature the treatment bath serving as a wash bath drained via the liquid drains 27. Subsequently the dye bath prepared in the meantime for the Dispersion coloring introduced from the additional container 33.

During the steam pre-treatment of the textile goods were present in this from the manufacturing tension solved, causing a possible shrinkage at the same time has been. Textured into the circular knitted fabric Yarn was puffed up so that the handle of the Goods become more voluminous. At the pretreatment temperature The knitwear also has a temperature of 130 ° C Heat setting. Overall, the textile goods become even stabilized and balanced, so that in the subsequent Wet treatment no annoying wrinkles or crease effects may occur. Because of the steam treatment subsequent washing treatment are in the textile remaining residues from production, like preparations, etc., removed so that they no disruptive influence on the subsequent wet finishing phases can exercise.

Example 2

Strand-like polyester / cotton circular knitwear in lining material quality with the fiber portions (65/35), the hose width 90 cm and a fabric weight of 260 g / m ² , as in Example 1, using air as a means of transport via the transport nozzles 12 and the reels 8 are drawn through the open loading openings 2 into the two stores 3 of the container 1. With a batch weight of 150 kg, this corresponds to a draw-in length of 320 m per store. After the closures 5 have been closed, the circulating endless product strands 4 are subjected to a water vapor pretreatment as in the first example. The steam pretreatment is used here in particular to prevent the occurrence of the so-called washboard effect, which can be caused by a different shrinkage behavior of the fiber components in the textile material. The resulting tensions are compensated for by damping.

The pretreatment is also carried out with steam from 130 ° C in the same way as in Example 1. After completing the holding phase, opening the Liquid drains 27 a rapid pressure drop in the Container 1 generated. Then the temperature of the Textile goods lowered to 60 ° C with a rinsing bath. After that one takes place in the so-called two-bath process Reactive dyeing as constant dyeing at 60 ° C and below a dispersion coloring with the one Hot rinsing of the reactive dye is connected.

Example 3

Cotton woven fabrics with a fabric width of 150 cm, a weight per unit area of 120 g / m ² and a batch weight of 140 kg per store, corresponding to a draw-in length of approx. 778 m, are treated.

The webware was wide before the strand treatment Condition desized, washed and dehumidified Condition docked on a winding roller.

From this winding roller (Kaule) one leaves when open Closures 5 in succession in each store 3 each Run in 778 m of the cotton fabric in rope form. The Transport nozzles 12 are suctioned out of the container 1 and acted upon by the blower 15 compressed air. After closing the control locks 5, the merchandise strands put into circulation are basically in similar to Example 1 on the Pretreatment temperature heated, which in the present Trap is 120 ° C.

The heating is basically the same Way as in Example 1, i.e. it will start with Open vent valve 49, which is in the container 1 contained air volume mainly through water vapor replaced. After closing the vent valve 49 the vapor pressure and the temperature in the container increase up to the steam pretreatment temperature of 120 ° C.

The textile material is then during a predetermined Holding time kept at the holding temperature of 120 ° C and then, similar to example 1, but on cooled to a temperature of 80 ° C. Because when heating up to the pretreatment temperature most of the air was drained from the container 1, arises in the Container when cooling from a temperature range of approx. 100 ° C a negative pressure. This creates this negative pressure compensated that the compressed gas shut-off valve 51 (Fig. 2) opened and nitrogen from a nitrogen source Overpressure is introduced into the container 1 until in this the vacuum is balanced again.

The steam treatment of the textile goods at 120 ° C is used as a pretreatment step for subsequent vat coloring of the textile goods on the same piece dyeing machine. The woven fabric is relaxed by the steam treatment, with an additional stabilization of the tissue structure is achieved.

Because the woven goods are already in the container 1 has a certain moisture content, results from the condensate load during steam heating is repeated Moisture increase, but because of the low Porosity i.e. of the small space between them Weave on the subsequent treatment in vat dyeing does not interfere.

When cooling to 80 ° C, the result is in the container 1 a saturated water vapor-nitrogen mixture, in which is left with only very low levels of atmospheric oxygen are. In order to avoid that over the shaft seal of the Blower 15 air is sucked in, a shaft seal provided with a sealing gas connection for nitrogen gas become.

The cooling of the water vapor nitrogen mixture 80 ° C in the container 1 can by direct contact with a coolant can be made as shown 4 is explained:

The circulation line 47 of the piece dyeing machine 1 is replaced by the circulation line 47a, which are not in the treatment agent filter 24, but directly in the container 1 at a point at 55 flows above the lowest point of the lower part of the container lies. With valve 32 closed and open Shut-off valve 48 is through the treatment agent circulation pump 25 a cooling liquid, preferably water, circulate in the circuit containing the container 1 leave, which contains the heat exchanger 30. The independent of the cooling gradient and the respective treatment temperature of the textile material on the heat exchanger 30 the temperature of coolant kept at 80 ° C or below flows from the orifice 55 of the circulation line 47a in a thin layer on the inner wall the container 1 down, where they are in one Swamp collects, whose liquid level indicated at 56 below the product lines 4 in the two stores 3 stands so that it does not contain the coolant come into contact.

The water vapor-nitrogen mixture in the container 1 is from the blower 15 above the container 1st circulates and strokes the surface of the coolant. By direct contact with the colder Coolant and by the condensate content, which is the water vapor-nitrogen mixture is precipitated out of the water vapor portion deprived of heat at the same time, so that the strands 4 are also cooled.

After cooling down, the level will change coolant accumulated below the package 53 lowered. It is then from the additional container 33rd from the for coloring by a common method proportion of auxiliaries required for vat dyes, Sodium hydroxide solution and hydrosulfite via the injection line 31 distributed at 80 ° C on the two strands 4. For this purpose, the shut-off valve 48 was previously closed and the shut-off valve 32 has been opened. After about 5 Line of goods is now circulating in the additional container 33 dispersed vat dye at 80 ° C over 8 up to 10 product line revolutions via the pump 34 and the open Valve 35 inserted into the suction line 28 and thus dosed in the injection stream supplied to the transport nozzles. The coloring is then according to the application instructions the inking units completed, i.e. after a Holding time at 80 ° C, the textile is cooled to 60 °, so depending on the vat dye used in this Temperature another bath pull-out takes place. After that rinsed without air and the alkali-soluble leuco compound of the dyes with the subsequent oxidation treatment to the insoluble starting dyes within of the fibers of the textile goods. The vat coloring is then ended.

With the above-described venting of the container 1 via the steam discharge through the vent valve 49 and the replacement of the air portion by nitrogen pressure gas, there are considerable savings in the reducing agent introduced sodium dithionite (Na ₂ S ₂ O ₄ ) (hydrosulfite) and the proportionate amount of sodium hydroxide solution. In relation to the volume of the container 1 that is not taken up by the treatment bath, only about a third of the otherwise usual hydrosulfite and alkali content is required. This saving also has an advantageous effect on lower pollutant pollution in the wastewater.

Example 4

Polyester woven fabric with a fabric width of 150 cm and a basis weight of 145 g / m ² and a batch weight of 130 kg per store, corresponding to a draw-in length of 600 m, is prewashed at a temperature of 80 ° C using air and a corresponding low steam inflow at 21, via the transport nozzles 12 and the reels 8 through the open loading openings 2 into the two stores 3 of the container 1. After the ends of the strands 4 have been sewn together and the fasteners 5 have been closed, the two endless strands 4 put into circulation are subjected to a prewash at 80 ° C. in which the textile goods are cleaned of preparation residues. After a rinsing step at 80 ° C, the textile goods are subjected to a dry run during approx. 5 runs of the product strand without a treatment liquor so that they can drain off sufficiently.

Then the circulating product lines 4 by exposure to water vapor, after prior venting of the container as in Example 1, in an almost saturated steam atmosphere at 130 ° C pretreatment temperature heated up. The product lines 4 are about 20 minutes kept at this temperature and then with a Gradients cooled from 2.5 ° C / min to 80 ° C. The cooling can be done in a similar manner as in Example 3, however, the negative pressure that forms in the container 1 not with nitrogen, but with compressed air.

Then at a start temperature of 80 ° C a 0.5 percent dispersion coloring was carried out. To becomes the treatment liquor prepared in the additional container 33 with the dispersed disperse dyes and the aids at the desired pH value setting in the container 1, after lowering the level beforehand, via the Injection line 31 initiated. The injection amount will preset at 80l / min for each store 3. The color fleet and the polyester woven goods are made according to a given Temperature-time program then heated to 110 ° C. The Woven goods are then opened during 5 rounds of goods Kept at 110 ° C. Then the injection line 31 supplied injection quantity per store 3 10l / min reduced. With a temperature gradient of 3 ° C / min the textile material to a wet fixing temperature heated from 130 ° C.

Because with the small injection quantity of 10 liters per Minute and goods store for heating the textile goods required amount of heat is not in the treatment liquor can be applied for heating the steam connecting piece 21 additionally steam directly Allow to flow into container 1. This process step is very economical for several reasons:

At 110 ° C the color separation of the applied dispersion coloring is almost complete, so when subsequent heating process not a color unevenness more occurs. With the reduced amount of induction of 10l / min and goods store and the resulting reduced Color liquor loading of the textile goods exist optimal conditions for opening the textile goods and for a corresponding laying of the strand-like Goods with every strand circulation. For the wet fixation of the Disperse dye suffices for a few strand revolutions 130 ° C.

The coloring is finished with a hot release. After an evaporation time of approx. 2 minutes during this The hot drain valve (27) is then still open as a preparation step for reductive cleaning the compressed gas connection 52 and the valve 51 nitrogen compressed gas introduced into the container 1. Because of that achieved very low air content in the water vapor-nitrogen mixture in the container 1 are the necessary Quantities of sodium hydroxide solution and hydrosulfite reduced considerably, to about a third of the otherwise required Amounts.

The staining is done after a treatment period for the reductive cleaning of about 10 minutes after each predefined, generally known regulations completed.

In the above based on exemplary embodiments The method according to the invention explained can according to the program control of the performance of the fan 15 predetermined parameters, such as the round trip time of the product lines 4, compliance with a predetermined slip between the line speed and the circulation speed the reel 8, the opening of the textile goods, which, especially in the case of tubular goods, not up to inadmissible balloon formation in the area of the memory leak may lead, etc. take place. Because the to heat up of the textile goods according to a predetermined temperature-time gradient fed during the preparatory step Energy from the steam flowing into the container 1 and by that delivered in the blower 15 to its impeller Work is delivered, it is usually required to achieve tension-free transport of goods regulate and limit the power of the fan 15. The amount of heat transferred from the fan 15 is from the Mass flow of the gas flowing through and its more specific Heat dependent. Through the power regulation of the Blower 15 is the compression of the gas stream resulting temperature increase limited.

Basically there is also the possibility of Completion of those taking place during the preparatory step Steam treatment of the product strands 4 treatment agents in such a small amount in the gas stream in to inject the transport nozzles 12 and through them to let the strands 4 distribute that no dripping of the treatment agent. That makes an extreme economic or economical finishing process. There is also the option of additives, i.e. so-called preparation approaches from the additional container 33 via a line indicated in Fig. 3 at 57, the one Shut-off valve 58 contains, immediately before the gas flow the transport nozzles 12 in a drop of the treatment agent to inject a small amount.

Claims (25)

Process for the treatment of strand-like textile material from synthetic or natural fibers or from mixtures of such fibers, in which the textile goods are placed in a container, passed through transport nozzle means and connected at their ends to form an endless strand of goods, the endless strand of goods is circulated in a closed direction by the transport nozzle means in the closed container, the transport nozzle means are acted upon by a driving gas stream which gives the endless strand of goods its feed movement in the predetermined direction of rotation, air or a steam / air mixture having a temperature below approx. 80 ° C. being used for introducing the textile goods into the container for this gas stream, the textile material is subjected to a treatment with a treatment agent during at least one treatment step, which treatment agent is applied to the textile material in the region of the transport nozzle means at a predetermined treatment temperature, wherein prior to the treatment with the treatment agent, in at least one of its own preparation or pre-treatment steps, any tension present in the textile material is released and / or shrinkage of the textile material is caused by the direct action of water vapor (steaming) on the textile material and this in the preparation or pre-treatment step, the transport nozzle means are only exposed to steam and the strand of goods is driven by the steam for a predetermined exposure time, is kept in circulation and thereby the textile material is brought to and / or kept at a predetermined pretreatment temperature which is independent of the treatment temperature in subsequent treatment steps with a treatment agent. A method according to claim 1, characterized in that the textile good at the end of the preparatory or Pretreatment step from the pretreatment temperature cooled to a predetermined temperature becomes. Method according to one of the preceding claims, characterized in that the temperature of the textile during the preparation or pre-treatment step and / or at another step during its treatment by contacting the container flowing through, acting on the transport nozzle means Gas, steam or steam / air flow with one maintained outside in the container the surface of the liquid present is regulated. Method according to one of the preceding claims, characterized in that the container at least in the preparation or pre-treatment step after the start of the steam application of the transport nozzle means temporarily open to the atmosphere and at least an air volume contained in the container partially removed from the container and by steam is replaced. Method according to one of the preceding claims, characterized in that at the end of the preparation or pre-treatment step the vapor pressure in quickly lowered the container by opening the container becomes. Method according to one of the preceding claims, characterized in that at the preparatory or Pretreatment step the transport nozzle means after or during steam application for a predetermined period of time be subjected to an inert gas. Method according to one of the preceding claims, characterized in that the textile material after the Preparation or pre-treatment step in the Container is rinsed. Method according to one of the preceding claims, characterized in that when exposed to steam accumulated condensate discharged from the container becomes. Method according to one of the preceding claims, characterized in that the transport nozzle means, at least partially with one from the container aspirated and via compressor means in the circuit guided steam or steam / air mixture become. A method according to claim 9, characterized in that the live steam tank on the pressure side of the Compressor is supplied. A method according to claim 9, characterized in that the live steam container on the suction side of the Compressor is supplied. Method according to one of claims 9 to 11, characterized characterized that the performance of the compressor means is regulated. Method according to one of the preceding claims, characterized in that the transport nozzle means during at least one treatment step a gas flow, which is a liquid Treatment agent is added, which is in the range of Transport nozzle agent on the textile material for action brought. A method according to claim 13, characterized in that especially to prepare a treatment step liquid treatment agent in one of the transport nozzle means separate circuit without Effect on the line of goods in the container is circulated. A method according to claim 14, characterized in that the temperature of the circulating treatment agent is regulated by heat exchanger means. A method according to claim 10, characterized in that the temperature of the circulating in the container Product line by exposure to steam on a predetermined Value held or at that value brought and that the treatment agent under predetermined, preferably at least approximated isothermal conditions merged with the textile material becomes. Device for carrying out the method according to one of the preceding claims a closable, pressure-resistant container (1), Transport nozzle means (12) for a textile material in the form of an endless strand of goods (4), a gas circulation device (11, 14, 15, 16) connected on the pressure side to the transport nozzle means and on the suction side to the container an addition device (33, 34, 35) for liquid treatment agent can be brought into action by the treatment agent in the area of the transport nozzle means on the textile material with a predetermined treatment temperature, a memory (3) formed in the container (1) for receiving the strand of goods (4) which is stacked on the outlet side of the transport nozzle means and a connection device (21) leading to the transport nozzle means for a steam source which is acted upon by steam at least during the preparation or pre-treatment step. Device according to claim 18, characterized in that the connection device has a steam connection piece (21), which is on the pressure side of compressor means (15) of the gas circulation device opens. Apparatus according to claim 17, characterized in that the connection device has a steam connection piece (21a), that on the suction side of compressor means (15) of the gas circulation device opens. Device according to one of claims 17 to 19, characterized characterized that the flameproof container (1) has a ventilation device (49). Device according to one of claims 17 to 19, characterized characterized that they have a container (1) containing, separated from the gas circulation device own circuit for liquid treatment agent having circulation pump means (25). Device according to claim 21, characterized in that in the circuit of the liquid treatment agent a heat exchanger device (30) is arranged is. Device according to claim 21 or 22, characterized in that that the circuit of the liquid treatment agent with the one containing the transport nozzle means Gas circuit via controlled valve means (32) is connected. Device according to one of claims 21 to 23, characterized characterized that the cycle of liquid Treatment agent in the container (1) in the area a surface leading to the lower part of the container opens (at 55), over the treatment liquid without Touch with the line of goods (4) in the one swamp containing lower part of the container (5) is conductive. Device according to one of claims 21 to 24, characterized characterized that the cycle of liquid Treatment agent with one device (57, 58) for adding additives to the treatment agent is trained.

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